1Fitement: The car parking heater glow plug is a replacement for Webasto Air Top 3500 12V, replacement for Webasto Air Top 5000 12V. 2Function: Used for preheating and heating the engine and cab in the low temperature and cold environment in winter, completely eliminating the wear caused by the cold start of the car. 3Precision Manufacturing: Silicon nitride ceramic as the matrix, tungsten wire as the heating source, through hot pressing sintering, grinding processing, welding leads, so as to make. 4High Performance: Long service life, light weight, energy saving, fast temperature rise, high temperature resistance, fast heating speed, good low temperature starting performance. 5Practical: The parking heater glow plug can quickly gasify, ignite, and burn fuel, and 42?55W high power can be quickly increased to keep warm shortly after the engine starts.